1331786474 has 12 divisors (see below), whose sum is σ = 2064202722. Its totient is φ = 644411880.

The previous prime is 1331786471. The next prime is 1331786507. The reversal of 1331786474 is 4746871331.

It can be written as a sum of positive squares in only one way, i.e., 1264300249 + 67486225 = 35557^2 + 8215^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1331786471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 344537 + ... + 348380.

Almost surely, 2^1331786474 is an apocalyptic number.

1331786474 is a deficient number, since it is larger than the sum of its proper divisors (732416248).

1331786474 is an equidigital number, since it uses as much as digits as its factorization.

1331786474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692981 (or 692950 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 1331786474 is about 36493.6497763652. The cubic root of 1331786474 is about 1100.2166168442.

The spelling of 1331786474 in words is "one billion, three hundred thirty-one million, seven hundred eighty-six thousand, four hundred seventy-four".